Figure 2 in A two-species distribution model for parapatric newts, with inferences on their history of spatial replacement

Figure 2. Two-species distribution model derived from Triturus cristatus and Triturus marmoratus records over France along with a suite of environmental variable (for details, see main text), extrapolated over neighbouring areas. The colours show the probability for any eligible locality to be occupied by T. cristatus (P c), from deep red for T. cristatus to deep blue for T. marmoratus. Intermediate colours, such as orange and green, represent intermediate probabilities (see the colour scale, which ranges from P c at zero to P c at unity). Areas in black have an elevation of> 1500 m a.s.l. A, model with forestation as documented. B, C, the mutual species distribution under the assumption that western Europe would be completely forested (full forest; B) and devoid of forestation (zero forest; C). The white line approximates the mutual species border as modelled in A. Note that large areas in the south-east of France are devoid of Triturus newts (cf. Fig. 1) and that Italy has another crested newt species (Triturus carnifex), but that a parapatric contact zone is being modelled nevertheless.